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Suppress PWM Input Low Error
We have a situation where a PWM input occasionally drops to 0%, which is intentional and not indicative of a fault condition.
However, this triggers a low error message that we would prefer to suppress unless the condition persists for a defined duration, such as 10 seconds.
As discussed in other forum topics, one approach is to place the PWM input channel into a function group and enable or disable the function group to control the error message display.
While this method can suppress the error message, it also disables the evaluation of the input channel, which is not suitable for our application.
Ideally we would like to:
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Suppress the low error message for transient drops below 2.5%.
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Display the error message only if the low condition persists for a specified duration (e.g., 10 seconds).
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Maintain continuous evaluation of the PWM input channel to ensure accurate monitoring.
Any help would be most appreciated
Customer support service by UserEcho
You could disable the built in alarm messages and make your own. We did this when I didn't know the text of the built in messages could be modified.
Alarm messages & Error messages are different, right?
This is the message in question, I can find no way to disable it
Using IQANDesign V7.02.31.9477
Ahhh you are correct. I had this problem with Voltage inputs but found if I set the min to 0 it would not throw the alarm, but this can't be done with the PWM channel :( Makes me wonder what the 'Alarm low' property being set to no actually does. Sorry for not being helpful.
Yes I found by setting Vin channel minimum input to 0 disables the error popup,
But the minimum PWM input could not be set below 30 as you pointed out, so the error popup is triggered when the input is below 15.
I wonder if this is by design??
If PWM input could be set to 0 & acted in the same way as Vin then this would solve our problem
Yes, the min and max MR are needed in order to have a timeout on the pulse width.
Alarm is different, that is for actual scaled values.